Abstract: Disclosed is a pair of eyeglasses with laterally slidable vision screens in each of the eyeglass openings. The vision screens have an opaque lower portion and a transparent upper portion, and have a clear see-through vertical slit which extends into the lower portion. By adjusting the vision screen so the golf ball, before it is struck, is viewed through the slits, and by keeping the ball in such view during the swing, the golfer controls his head position. A second form of my invention is shown which clips onto the user's regular eyeglasses, and a third form attaches adhesively to the lower portion of regular eyeglasses.